 Calcium, as well as phosphorus levels, are regulated by the parathyroid gland and they have an inverse relationship. So usually when calcium levels are high because of increased release from the parathyroid gland of parathyroid hormone, then phosphorus levels will be low. Well when calcium levels are low, phosphorus levels will be high. And so then just remember that signs and symptoms of hypercalcemia are the same as the ones of hypophosphatemia. Signs and symptoms of hypocalcemia will be the same as signs and symptoms of hyperphosphatemia to help you get those electrolytes straight. Thanks for watching and watch my full video on YouTube about this disorder.